EP0639262A1 - Vorrichtung zum testen der funktionsfähigkeit einer anlage zum detektieren von in einem partikelstrom mitgeführten, wärmestrahlung emittierenden, teilchen. - Google Patents
Vorrichtung zum testen der funktionsfähigkeit einer anlage zum detektieren von in einem partikelstrom mitgeführten, wärmestrahlung emittierenden, teilchen.Info
- Publication number
- EP0639262A1 EP0639262A1 EP93909346A EP93909346A EP0639262A1 EP 0639262 A1 EP0639262 A1 EP 0639262A1 EP 93909346 A EP93909346 A EP 93909346A EP 93909346 A EP93909346 A EP 93909346A EP 0639262 A1 EP0639262 A1 EP 0639262A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- detector
- transmitter
- particle stream
- chamber
- testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/704—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter
- G01F1/708—Measuring the time taken to traverse a fixed distance
- G01F1/7086—Measuring the time taken to traverse a fixed distance using optical detecting arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/008—Indicating or recording presence, absence, or direction, of movement by using a window mounted in the fluid carrying tube
- G01P13/0086—Indicating or recording presence, absence, or direction, of movement by using a window mounted in the fluid carrying tube with photo-electric detection
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P21/00—Testing or calibrating of apparatus or devices covered by the preceding groups
- G01P21/02—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers
- G01P21/025—Testing or calibrating of apparatus or devices covered by the preceding groups of speedometers for measuring speed of fluids; for measuring speed of bodies relative to fluids
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/02—Monitoring continuously signalling or alarm systems
- G08B29/04—Monitoring of the detection circuits
- G08B29/043—Monitoring of the detection circuits of fire detection circuits
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
- G08B17/113—Constructional details
Definitions
- Device for testing the functionality of a system for detecting particles which emit heat radiation and are carried in a particle stream
- the invention relates to a device for testing the functionality of a system for detecting in a particle stream entrained, emitting heat radiation, for. B. glowing or glowing particles, with at least two spatially separated detectors arranged on the circumference of a tube through which the particle stream flows, each detector being arranged in a chamber shielded from the particle stream with at least a layer permeable to heat radiation and a corresponding method using the device.
- this tube In order to detect heated or glowing particles carried in this particle stream, this tube is provided with detectors which signal the detected particles via a signaling device.
- a self-test method in which a light-emitting diode, the light of which practically does not penetrate the filter disk placed in front of the sensor, emits a short flash of light in order to test whether the sensor is also responding. This only determines the functionality of the sensor itself.
- this device cannot detect the defect that occurs most frequently in practice, namely contamination or damage to the filter disc.
- each detector has a transmitter likewise arranged in the chamber
- each transmitter and detector is connected to a central switching point.
- the transmitter as a z. B. is formed in the infrared or visible light source, preferably the sensitivity range of the detector being adapted to the wavelength of the light emitted by the light source.
- a further feature of the invention is that a plurality of chambers, each receiving the transmitter and detector, are arranged in lines along the length of the tube carrying the particle stream, two chambers lying opposite each other.
- the method provided according to the invention using the device according to the invention is characterized in that the test signal emitted by the transmitter arranged in one chamber is received by the detector arranged in at least one other, preferably the opposite chamber and sent to a central switching point is forwarded, which carries out a comparison of the received signal or signals with the test signal.
- a final feature of the invention is that the transmission power of each transmitter is variable and several test runs are carried out in succession with different intensities.
- FIG. 1 shows a schematic representation of the device according to the invention
- 2a, b and 3 show a functional diagram of the device according to the invention
- 4 shows a signal comparison diagram
- FIG. 5 shows a further variant of the device according to the invention.
- the particles 2 emerging from a work station 1 are sucked into a pipe 3 via a trigger and fed to a filter 4.
- the particles 2 flowing through the tube 3 become by detectors 5, 5 'arranged on the tube walls, which transmit glowing particles to a central switching point (not shown).
- the transmitters as well as the detectors are
- each cover plate 8, 8 ' is at least permeable to heat radiation and is preferably limited to a wavelength range matched to the radiating particles.
- FIGS. 2a, b the procedure shown in FIGS. 2a, b is followed, for example.
- Four detectors 5, 5 ', 5' ', 5' '' and transmitters 7, 7 ', 7' ', 7' '' are arranged around the tube 3. 2a, the transmitter 7 emits a test signal in the form of a flash of light, which is detected by the detectors 5 ', 5 ", 5"' and passed on to the central switching point. Subsequently, as shown in FIG.
- the transmitter 7 ′′ emits a corresponding flash of light, which is received and passed on by the detectors 5, 5 ′, 5 ′′ ′′.
- the light source is a preferably infrared diode which is adapted to the wavelength sensitivity range of the detectors and which can penetrate well through the cover plates. However, it is possible to work in the visible range with suitable boundary conditions.
- Each sensor itself is equipped with a microprocessor or microcontroller, as a result of which commands and data can be exchanged with the central switching point.
- the method in which light flashes are emitted in succession from different transmitters, is used in order to also be able to reliably determine whether a detector has failed.
- Fig. 4a shows the test signal emitted by the transmitter, Fig. 4b, c each a good or bad received signal. After comparison with the test signal, the signal shown in FIG. 4c shows that the system is no longer functional, for example because the cover plates are dirty.
- the alarm center issues an alarm or warning.
- FIG 3 shows a circuit arrangement of the device with which the method can be carried out.
- the signal coming from the control center runs via an interface 9 and a block 10 formed by resistors graded according to size to a transmitter 7.
- the power of the emitted signal can be varied via the resistors.
- the signal picked up by the detector 5 is fed back to the central via an interface 9. The intensity can also be changed by using the resistors differently.
- FIG. 5 A further embodiment of the device is shown in FIG. 5, with several transmitters and detectors carrying chambers distributed opposite one another over the length of the tube.
- the number of detectors used depends on the diameter of the tube.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT924/92 | 1992-05-06 | ||
AT92492 | 1992-05-06 | ||
PCT/AT1993/000077 WO1993022630A2 (de) | 1992-05-06 | 1993-05-06 | Vorrichtung zum testen der funktionsfähigkeit einer anlage zum detektieren von in einem partikelstrom mitgeführten, wärmestrahlung emittierenden, teilchen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0639262A1 true EP0639262A1 (de) | 1995-02-22 |
EP0639262B1 EP0639262B1 (de) | 1996-04-17 |
Family
ID=3502979
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93909346A Expired - Lifetime EP0639262B1 (de) | 1992-05-06 | 1993-05-06 | Vorrichtung zum testen der funktionsfähigkeit einer anlage zum detektieren von in einem partikelstrom mitgeführten, wärmestrahlung emittierenden, teilchen |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0639262B1 (de) |
AT (1) | ATE137014T1 (de) |
AU (1) | AU3979093A (de) |
DE (1) | DE59302277D1 (de) |
WO (1) | WO1993022630A2 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4429311C2 (de) * | 1994-08-18 | 1998-05-20 | Daimler Benz Ag | Prüfeinrichtung für Fahrzeuge mit magnetfeldsensitivem Raddrehzahlsensor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2914588C3 (de) * | 1979-04-10 | 1982-01-21 | Preussag Ag Feuerschutz, 2060 Bad Oldesloe | Einrichtung zur Untersuchung oder Prüfung der Empfindlichkeit von Funkenmeldern |
US4464575A (en) * | 1983-09-06 | 1984-08-07 | Firetek Corporation | Test device for an optical infra red detector |
DE3817607A1 (de) * | 1988-05-24 | 1989-11-30 | Preussag Ag Feuerschutz | Verfahren zum ausloesen von uv-empfindlichen empfangselementen |
-
1993
- 1993-05-06 AU AU39790/93A patent/AU3979093A/en not_active Abandoned
- 1993-05-06 WO PCT/AT1993/000077 patent/WO1993022630A2/de active IP Right Grant
- 1993-05-06 AT AT93909346T patent/ATE137014T1/de not_active IP Right Cessation
- 1993-05-06 DE DE59302277T patent/DE59302277D1/de not_active Expired - Fee Related
- 1993-05-06 EP EP93909346A patent/EP0639262B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9322630A2 * |
Also Published As
Publication number | Publication date |
---|---|
AU3979093A (en) | 1993-11-29 |
DE59302277D1 (de) | 1996-05-23 |
ATE137014T1 (de) | 1996-05-15 |
EP0639262B1 (de) | 1996-04-17 |
WO1993022630A3 (de) | 1993-12-09 |
WO1993022630A2 (de) | 1993-11-11 |
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